89 Johnson 9.9 cooling system obstruction

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  • August 9, 2016 at 9:53 am #41826
    billw
    Participant

      US Member

      If you haven’t actually lifted the block off of the mid section yet (From your post, it sounds that way) then the toughest fasteners, the ones that hold the exhaust tube onto the bottom of the power head, are yet to come…..

      While the block is off, you might want to give your upper engine mounts a fore and aft yank and see if they are solid. Failure of those uppers is the other 9.9/15 common flaw.

      Long live American manufacturing!

      August 10, 2016 at 4:53 am #41862
      seakaye12
      Participant

        US Member

        Courtesy of Leroy’s Ramblings….here’s a photo of the good spot to apply leverage to break the powerhead free.

        August 10, 2016 at 12:09 pm #41864
        fleetwin
        Participant

          US Member

          OK, well Leroy is surely prying in the right area, because it is the lower seal housing that makes these powerheads tough to remove.
          But, he is playing with fire jamming a chisel between the powerhead and ex hsg mating surfaces, damage to both surfaces seems inevitable.

          August 10, 2016 at 12:11 pm #41865
          fleetwin
          Participant

            US Member
            quote BillW:

            If you haven’t actually lifted the block off of the mid section yet (From your post, it sounds that way) then the toughest fasteners, the ones that hold the exhaust tube onto the bottom of the power head, are yet to come…..

            While the block is off, you might want to give your upper engine mounts a fore and aft yank and see if they are solid. Failure of those uppers is the other 9.9/15 common flaw.

            Excellent point….It may be easier to evaluate the mounts before removing the powerhead by rocking the powerhead fore and aft.

            August 10, 2016 at 6:47 pm #41874
            PugetSoundBoater
            Participant

              I got the powerhead off without damaging anything.Soaking the 4 exhaust tube bolts overnight with acetone/powersteering fluid,will use some heat removing those .The mounts you mention are at the top of the midsection, will check those out .Cleaning everything up today ,lubed the shift linkage.Anything else to check while i’m in there? As this is my first powerhead removal,your help has been great.

              "Some people want to know how a watch works, others just want to know what time it is"
              Robbie Robertson

              August 10, 2016 at 11:06 pm #41880
              Casey Lynn
              Participant

                US Member

                Now is the best time to freshen up all the fuel lines, the overboard indicator line, and the carburetor may enjoy a good cleaning and fresh kit. The starter is already out of the way so it is an easy task.

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